﻿using System; 
using System.Windows.Input;

namespace Material.Dialog.Commands
{
    public class RelayCommand : ICommand
    {
        private Action<object> execute;
        private Func<object, bool> canExecute;
        public event EventHandler CanExecuteChanged;

        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
        {
            this.execute = execute;
            this.canExecute = canExecute;
        }

        public bool CanExecute(object parameter)
        {
            return this.canExecute == null || this.canExecute(parameter);
        }

        public void Execute(object parameter)
        {
            this.execute(parameter);
        }

        public void RaiseCanExecute()
        {
            var handler = CanExecuteChanged;
            handler?.Invoke(this, new EventArgs());
        } 
    }
}
